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Programming Puzzle 29 - Another math treat

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  • Programming Puzzle 29 - Another math treat

    Puzzle 29

    If you prepend a 1 to a five digit number, the result
    is exactly 3 times smaller than if you appended a 1 to
    the same five digit number. What's the five digit number?

    i.e. Assume a five digit number NNNNN
    1NNNNN is exactly 3 times smaller than
    NNNNN1. What is NNNNN?

    The "professor" thinks this is too easy, but I insisted you needed a break after Puzzle 28, so
    have fun. Don't let conversion from string to numeric to string to numeric to string, and so on, drive
    you crazy!

    Your task boys and girls is to write an xbasic script that solves this puzzle. Display your
    answer in the trace window. For extra credit don't post your script in the body of a reply,
    but figure out how to "export" your script to a text file, and then "attach" your text file
    to your reply here.


    Credit for this puzzle:

  • #2
    Re: Programming Puzzle 29 - Another math treat


    I hope my comments are clear. Five lines of code did it.
    Attached Files
    Stephen Pilon
    Associate Librarian
    Christendom College


    • #3
      Re: Programming Puzzle 29 - Another math treat

      here is mine
      answer in three places 1> message box, 2> trace window 3> status bar - overkill?

      Last edited by GGandhi; 06-10-2012, 09:43 PM.
      thanks for reading


      version 11 3381 - 4096
      mysql backend
      1 914 924 5171


      • #4
        Re: Programming Puzzle 29 - Another math treat

        re uploaded file to add
        end to the for next loop

        thanks for reading


        version 11 3381 - 4096
        mysql backend
        1 914 924 5171


        • #5
          Re: Programming Puzzle 29 - Another math treat


          Very nice! When I saw your solution I woke the "professor" up to show it to him. He was his usual grumpy sellf, and muttered something about EXIT FOR before falling back asleep. You might check it out in the helps, since that can be a better way to jump out of a FOR ... NEXT loop.

          Good work.


          • #6
            Re: Programming Puzzle 29 - Another math treat


            Very nice!

            You did a great job of narrowing the range of values to be checked. Your decision to step through the values 30 at a time was inspired. In my own solution I was looking for a way to "spin" the 10's digit ten at a time, without noticing that the script could be speeded up by spinning 30 at a time. Have you studied with the "professor" before?


            • #7
              Re: Programming Puzzle 29 - Another math treat

              Of course, just for fun, if I was a smart-alic mathematician, I would do this:


              • #8
                Re: Programming Puzzle 29 - Another math treat

                Andy, your solution illustrates another approach altogether. The key to all of these puzzles is figuring out how to express the problem in terms the machine can understand. Thanks for showing us a different way.


                • #9
                  Re: Programming Puzzle 29 - Another math treat

                  Answer: Puzzle 29.txt


                  • #10
                    Re: Programming Puzzle 29 - Another math treat

                    Very good, Tony.

                    You should read up on "exporting" and "importing" scripts. The professor awards "extra credit" if solutions are pre-formatted for easy import. The same technique can be a big help in maintaining customer databases, as well. Much better than copying and pasting, or using simple text files.

                    -- tom